<!-- src\views\Home.vue -->
<template>
  <div class="home">
    <!-- 头部搜索框 -->
    <header class="home-header wrap" :class="{active : headerScroll}">
      <router-link to="./category">
        <!-- 分类图标 -->
        <i class="nbicon nbmenu2" />
      </router-link>
      <!-- 搜索框内容 -->
      <div class="header-search">
        <span class="app-name">新蜂商城</span>
        <i class="iconfont icon-search"></i>
        <!-- 单击后跳转到商品搜索列表 -->
        <router-link class="search-title" to="./product-list"
          >山河无恙，人间皆安</router-link
        >
      </div>
      <!-- 跳转到登录，如果没有登录，登陆了就显示去个人中心的图标 -->
      <router-link class="login" to="./login" v-if="!isLogin">登录</router-link>
      <router-link class="login" to="./user" v-else>
        <van-icon name="manager-o" />
      </router-link>
    </header>
    <!-- 轮播图组件 -->
    <swiper :list="swiperList"></swiper>

    <!-- 导航栏模块 -->
    <div class="category-list">
      <div
        v-for="item in categoryList"
        v-bind:key="item.categoryId"
        @click="tips"
      >
        <img :src="item.imgUrl" />
        <span>{{ item.name }}</span>
      </div>
    </div>

    <!-- 首页商品模块 -->
    <div class="good">
      <header class="good-header">新品上线</header>
      <!-- 骨架 -->
      <van-skeleton title :row="3" :loading="loading">
        <div class="good-box">
          <template v-for="(item, index) in newGoodses" :key="index">
            <!-- 全局过滤项 -->
            <good-item
              :cover="$filters.prefix(item.goodsCoverImg)"
              :name="item.goodsName"
              :price="item.sellingPrice"
              @goToDetail="goToDetail"
              :id="item.goodsId"
            />
          </template>
        </div>
      </van-skeleton>

      <header class="good-header">热门</header>
      <!-- 骨架 -->
      <van-skeleton title :row="3" :loading="loading">
        <div class="good-box">
          <template v-for="(item, index) in hots" :key="index">
            <!-- 全局过滤项 -->
            <good-item
              :cover="$filters.prefix(item.goodsCoverImg)"
              :name="item.goodsName"
              :price="item.sellingPrice"
              @goToDetail="goToDetail"
              :id="item.goodsId"
            />
          </template>
        </div>
      </van-skeleton>

      <header class="good-header">推荐商品</header>
      <!-- 骨架 -->
      <van-skeleton title :row="3" :loading="loading">
        <div class="good-box">
          <template v-for="(item, index) in recommends" :key="index">
            <!-- 全局过滤项 -->
            <good-item
              :cover="$filters.prefix(item.goodsCoverImg)"
              :name="item.goodsName"
              :price="item.sellingPrice"
              @goToDetail="goToDetail"
              :id="item.goodsId"
            />
          </template>
        </div>
      </van-skeleton>
    </div>

    <!-- 公用底部导航栏 -->
    <nav-bar />
  </div>
</template>
  
  <script>
import { reactive, onMounted, toRefs, nextTick } from "vue";
import NavBar from "components/NavBar.vue";
import { getLocal } from "utils/help";
import Swiper from "../components/Swiper.vue";
import { getHome } from "service/home";
import GoodItem from "../components/GoodItem.vue";
import { useRouter } from "vue-router";

export default {
  name: "home",
  components: {
    NavBar,
    Swiper,
    GoodItem,
  },
  setup() {
    const router = useRouter(); //生成路由实例

    const state = reactive({
      isLogin: false, // 是否已登录
      swiperList: [], // 轮播图数据
      categoryList: [
        {
          name: "新蜂超市",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E8%B6%85%E5%B8%82%402x.png",
          categoryId: 100001,
        },
        {
          name: "新蜂服饰",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E6%9C%8D%E9%A5%B0%402x.png",
          categoryId: 100003,
        },
        {
          name: "全球购",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E5%85%A8%E7%90%83%E8%B4%AD%402x.png",
          categoryId: 100002,
        },
        {
          name: "新蜂生鲜",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E7%94%9F%E9%B2%9C%402x.png",
          categoryId: 100004,
        },
        {
          name: "新蜂到家",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E5%88%B0%E5%AE%B6%402x.png",
          categoryId: 100005,
        },
        {
          name: "充值缴费",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E5%85%85%E5%80%BC%402x.png",
          categoryId: 100006,
        },
        {
          name: "9.9元拼",
          imgUrl: "https://s.yezgea02.com/1604041127880/9.9%402x.png",
          categoryId: 100007,
        },
        {
          name: "领劵",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E9%A2%86%E5%88%B8%402x.png",
          categoryId: 100008,
        },
        {
          name: "省钱",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E7%9C%81%E9%92%B1%402x.png",
          categoryId: 100009,
        },
        {
          name: "全部",
          imgUrl:
            "https://s.yezgea02.com/1604041127880/%E5%85%A8%E9%83%A8%402x.png",
          categoryId: 100010,
        },
      ],
      newGoodses: [],
      hots: [],
      recommends: [],
      loading: true,
      headerScroll: false,//滚动透明判断
    });
    onMounted(async () => {
      const token = getLocal("token");
      if (token) {
        state.isLogin = true;
      }

      const { data } = await getHome()
      console.log(data)
      state.swiperList = data.carousels
      state.newGoodses = data.newGoodses
      state.hots = data.hotGoodses
      state.recommends = data.recommendGoodses
      state.loading = false
    });

    const goToDetail = (id) => {
      router.push({
        path: `/product-detail/${id}`,
        query: { id: id },
      });
    }

    nextTick(() => {
      const homeNode = document.querySelector('.home')
      homeNode.addEventListener('scroll', () => {
        //获取滚动条距离顶部的高度
        let scrollTop = homeNode.pageYOffset || homeNode.scrollTop || homeNode.scrollTop
        //当高度大于100px时，修改headerScroll的值为true，否则为false
        scrollTop > 100 ? state.headerScroll = true : state.headerScroll = false
      })
    })
    return {
      ...toRefs(state),
      goToDetail
    };
  },
};
</script>
  
  <style lang="less" scoped >
@import "../theme/custom.less";
.home-header {
  position: fixed;
  left: 0;
  top: 0;
  .wh(100%, 50px);
  .fj();
  line-height: 50px;
  padding: 0 15px;
  .boxSizing();
  font-size: 15px;
  color: #fff;
  z-index: 10000;
  .nbmenu2 {
    color: @primary;
  }
  .header-search {
    display: flex;
    .wh(74%, 30px);
    line-height: 20px;
    margin: 10px 0;
    padding: 5px 0;
    color: #232326;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    .app-name {
      padding: 0 10px;
      color: @primary;
      font-size: 20px;
      font-weight: bold;
      border-right: 1px solid #666;
    }
    .icon-search {
      padding: 0 10px;
      font-size: 17px;
    }
    .search-title {
      font-size: 12px;
      color: #666;
      line-height: 21px;
    }
  }
  .icon-iconyonghu {
    color: #fff;
    font-size: 22px;
  }
  .login {
    color: @primary;
    line-height: 52px;
    .van-icon-manager-o {
      font-size: 20px;
      vertical-align: -3px;
    }
  }
}
.category-list {
  display: flex;
  flex-shrink: 0;
  flex-wrap: wrap;
  width: 100%;
  padding-bottom: 13px;
  div {
    display: flex;
    flex-direction: column;
    width: 20%;
    text-align: center;
    img {
      .wh(36px, 36px);
      margin: 13px auto 8px auto;
    }
  }
}
.home{
    height: 100%;
    overflow: hidden;
    overflow-y: scroll;
}
.good {
    .good-header {
      background: #f9f9f9;
      height: 50px;
      line-height: 50px;
      text-align: center;
      color: @primary;
      font-size: 16px;
      font-weight: 500;
    }
    .good-box {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
    }
}

</style>